ports not working with sudo

[Eckard Brauer]

Am Fri, 9 Dec 2022 14:16:57 +0100
schrieb Kaustubh Bansal <kaustubh.cool at gmail.com>:

> $ port -v selfupdate
> Error: Insufficient privileges to write to MacPorts install prefix.

Has there happened some recent(?) change in MacOS' permission system
(sorry, I'm still back on 10.6, as I have some PPC machines only)? For
me, the former thread "Unable to install xz" already sounded like that,
now here's some similar thing...